[quote=Maki Casanova]
Not relic compatible per-se, but how strong they will be when using it is my concern. We want our characters to be strong, but they won't reach their highest potential if they are restrained by how much Old Kingdom blood they have.
[/quote]

Wouldn't that problem be solved of we go with the combination? You can decide for yourself if your character is somehow connected by blood to an old combat-oriented relic or that your relic is an "adapted" one or if the lock has somehow faded over time. 

Personally, I really don't think we need to reach a consensus, we'll at least have to come up with a few theories that relic scholars would have uncovered over time, but seeing how different all relics are, there could be a lot of theories as well.